Thanks to everyone who replied!
I called today and well, within 30 seconds of trying to explain what I needed help with, I burst into tears. It was the part where I had to explain my change in circumstances. The lady who answered the call was lovely! She calmed me down, was really patient listening and said it would be okay.
So, she put me back on the register and tomorrow I can call the office and arrange a course, asap. Cross fingers I can book one over the next two weeks!
I think I was lucky - I hadn't deliberately ignored it and I have not yet received a summons or anythin